Portable window scaffold



Oct. 14. 1924. 1 1,511,260

E. BRou ssEAu PQRTABLE WINDOW SCAFFOLD Original Filed March 25, 1922 2 Sheets-Sheet l [NIT/V7 0]? Edmondfirousqseau ATTomYs Oct. .14. 1924.

1,511,260 E. BROUSSEAU PORTABLE WI NDQW S CAFFOLD Original Filed March 25 1922 2 Sheets-Sheet. 2

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ATTORNEYS latentecl Get. 14, 1924.

EDMOND BROUSSEAU, 0F HUBDMANS BRIDGE, ONTARIO, CANADA.

PORTABLE WINDOVI SCAFFOLID.

Application filed March 25, 1922, Serial No, 546,895.

To aZZ whom it may concern Be it known that I, EDMOND Bnoussnxu, a subject of Great- Britain, residing at Hurdnians Bridge, in the county of Russell and Province of Ontario, Canada, have invented certain new and useful Improvements in Portable W'indow f caffolds. of which the following is a specification.

My invention relates portable window scaffolds of the type wherein the platform is supported by side pieces carrying adjust able brackets and a collapsible railing.

The object of my invention is to simplify the construction of collapsible scaffolds and produce a. device of great rigidity and security for the person using the same.

ln the drawings:

Figure 1 is a perspective of the complete scaffold.

Fig. 2 shows the scaffold collapsed.

. Fig. 3 is a detail showing the connection for the side and end pieces.

Fig. 4 shows the adjustable brackets and. the clamp screw detached.

Fig. shows the scaffold attached to a window base.

Fig. 6 is a detail showing the clamp screw holder.

Referring to Fig. 1, 1, 1 are the side pieces preferably of angle iron and 2 the end piece of similar iron. The sides and end pieces are joined by a rivet 3 passing through the flange of both pieces as shown in Fig. The inner ends of pieces 1, 1 are provided with clamping jaws 4:. These jaws are adjustable in length by being made in two overlapping pieces retained by bolts inserted in some selected holes according to the length required. The horizontal flanges of the side pieces 1, 1. are provided with perforations 5, Fig. 1-, intended to receive the bolts (3, 6, of bracket 7 to which the clamp screw holder is fastened by pins or bolts passed through holes 9, 9 of the holder and one of the holes 10 in the bracket. according to the required adjustment. To the side pieces 1, 1 and end piece 2 are pivotally at tached the railing bars 12 and 13. Bars 12 are on the side pieces 1 while bars 13 are on the end piece 2. Bars 12 are provided with an upper bar 1 1 pivoted thereto. Bars 13 are pivoted to an upper bar 15 which is bent at each end to overlap bars 14: and united together by pins 16 passed through Renewed. March 10, 1924.

perforations in both bars. An articulated brace 17 is pivotally connected to pieces 1, l and bars 14. A bar 18 is pivoted to the horizontal flanges of pieces 1, 1. When it is desired to collapse the scaffold the pins 16 are removed from the upper bars 14 and 15. he braces 1'7 are folded. with the bars 12. and the pieces 1, 1 are brought together, when the scaffold assumes the appearance illustrated in Fig. 2.

In Fig. 5 the bracket is shown applied. to a window opening, 19 being the window frame sill, 20 the inner wall of the room. When the clamp jaws are to be applied to a plastered wall a bar 21 is fastened to the clamps 4 in order to prevent them from breaking the plaster.

Having now described what 1 claim is 1. In a scaffold of the class described in combination a pair of side bars, an end bar pivoted thereto so as to enable the bars to fold together. clamping jaws connected to the other end of the bars, a screw clamp bracket adjustab-ly fastened to said side bar and a rigid cross bar pivotally mounted between the two side bars.

2. In a scaffold of the class described, in combination, a pair of side bars, an end bar pivoted thereto so as to enable the bars to fold together, clamping jaws connected to the other end of the bars, a screw clamp bracket adjustably fastened to said side bars and screw adjustably mounted on said bracket and a rigid cross bar pivotally mounted between the two side bar.

3. In a portable scaffold two side pieces each having an adjustable clamping jaw at one end thereof, an end piece pivoted to each side piece and a cross bar also pivoted to the side pieces, a folding railing comprising bars pivoted to the side and end pieces, the bars pivoted to the side pieces having upper bars pivoted thereto, a bar pivoted to the upper end of the end piece bars, means to detachably unite said upper bars, and articulated braces for holding said bars in upright position.

EDMOND BROUSSEAU.

In the presence of M. GnIMns, M. BLACK.

my invention,

The bars 13 are also folded sidewise 

